Glare guards are traffic safety products installed on the median strip of highways to address the issue of oncoming car headlights causing glare. They are commonly set up on the median guardrails or between them, with some also installed on the central opening retractable guardrails. They are categorized by material into steel glare guards, plastic glare guards, and fiberglass glare guards. In terms of appearance, common types include straight plates, reverse S-shaped, embossed glare guards, and highway landscape glare guards.